2545440 has 48 divisors (see below), whose sum is σ = 8019648. Its totient is φ = 678656.

The previous prime is 2545429. The next prime is 2545447. The reversal of 2545440 is 445452.

It is a tau number, because it is divible by the number of its divisors (48).

It is a Harshad number since it is a multiple of its sum of digits (24).

It is a self number, because there is not a number n which added to its sum of digits gives 2545440.

It is not an unprimeable number, because it can be changed into a prime (2545447) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 2172 + ... + 3131.

It is an arithmetic number, because the mean of its divisors is an integer number (167076).

2^2545440 is an apocalyptic number.

2545440 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

2545440 is an abundant number, since it is smaller than the sum of its proper divisors (5474208).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

2545440 is a wasteful number, since it uses less digits than its factorization.

2545440 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5321 (or 5313 counting only the distinct ones).

The product of its (nonzero) digits is 3200, while the sum is 24.

The square root of 2545440 is about 1595.4435120054. The cubic root of 2545440 is about 136.5382361453.

The spelling of 2545440 in words is "two million, five hundred forty-five thousand, four hundred forty".